Grate bar



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W. SOLT, Sr. 8v W. D. KLINE.

GRATB BAR. n

No. 333,687. Patented Jan. 5, 1886.

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W. SOLT,S1.& W. D. KLINE.

GRATE BAR. No. 333,687. Patented Jan. 5, 1886.

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UNITED 4STATES PATENT OFFICE.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 333,687, dated January5, 1886.

Application tiled October 6, 1855. Serial No. 179,176. (No model.)

y To a/ZZ whom t may concern:

- Be it known that we, WILLIAM SoLT, Sr., and WILLIAM D. KLINE, citizensof the United States, residing at Freeland, in the county of Luzerne andState of Pennsylvania, have invented a new and useful Improvement inGrate- Bars, of which the following is a speciiication, reference beinghad tothe accompanying dra-W` ings.

This invention relates to an improvement in gratebars, the object beingto provideadevice of this character which will be light and durable, andhave allowance for expansion and contraction, so as to prevent warping.

A further object of the invention is to provide a grate bar withdetachable sections, which can be renewed while the fire is in progress;and a further obj ect is to provide a gratebar which will have increasedventilation, thereby securing a more perfect combustion with acorresponding decrease in the amount of fuel consumed.

With these ends in view the said invention consists in the peculiarconstruction, combination, and arrangement of parts, all'as here inafterset forth and claimed.

In the accompanying drawings, Figure l is a perspective view of ourimproved gratebar, one of the end grate-sections being removed. Fig. 2is a longitudinal vertical section of the saine. Fig. 3 is a plan viewof the grate-bar complete. Fig. 4 is a transverse vertical section onthe line m 0c, Fig. 3. Fig. 5 is a detailed perspective view of one ofthe gratesections. Figs. 6, 7, and 8 are plan views of different Iormsof gratesections. Figs. 9, 10, and 11 are plan views of the bearing-barfor the gIate-sections,with different forms of mortises andVentilating-openings.

Like letters are used to indicate corresponding parts in the severalfigures of the drawings.

Referring to the drawings, A designates the ventilator-bar, which is inthe shape of a U in cross-section, having side walls, B B', connectedtogether at the top, all being cast in one piece. The top of the bar Ais slotted longitudinally at a a, to provide ventilatingopenings, andbetween the latter are formed Inortises b b. When the bearing-bar iscurved at the top, as shown in the drawings, laterallyextendingshoulders c c should be provided on each side of the mortises b for thesupport of the grate-sections; but the top of the bar A may be madeflat, as in Figs. 10 and 11, and open either partly or throughout, withbraces or cross-pieces to connect the side walls, and in that case thesaid shoulders may be dispensed with.

At the ends of the bar A are located bearing-plates C C, whicharesupported in the walls of the furnace in the usual manner, and areprovided with supporting-blocks a', (three in number,) secured to orformed integral therewith on the under side of the plates to raise themabove the walls of the furnace. Be tween the blocks a the plates C C areprovided with recesses or depressions b,which forni passage-ways for theair to circulate therein. The combination of the blocks a with therecesses b' thus allows for the ventilation of the bearinglplates, so asto prevent them from burning out, and also enables said plates to bereadily handled in removing and replacing them. Said plates G areprovided with an integral ringer, D, extending inwardly from the WILLIAMsoLT, sn., AND WILLIAM D.KLINE, or EEEELAND, PENNSYLVANIA.

center over the bar A, and also formed with 4 a ledge, d, on their innersides, from which ledge extend blocks or lugs e, spaces or inter valsbeing left between the lugs.

The bar A, with the bearingplates C, is of one casting, and since thebar A is hollow or channeled, and the ends thereof are the points ofgreatest strain, it is necessary to provide means to compensate forthis. We effect the desired end by casting the middle finger, D,integral with the bearingplates, thereby imparting the necessarystrength to the ends of the bar, and not increasing the weight thereofto any appreciable extent; but the sectional finger D may be dispensedwith by forming the ends of the side walls, B B', thicker or deepertothe desired extent and the same object obtained.

E designates the grate-sections, which in the present instance areconstructed of perforated plates having grooves running longitudinallyalong the upper face thereof, the ends of the plates being curvedsubstantially in the arc of a circle. On the under side of the platesare cast at intervals depending transverse flanges F, which are extendedoutward and upward on IOO each side of the grate-sections, and form prolons are cast on the under side of these sections jectionsf at intervals,as shown. Projecting downwardly from the flanges F, near the center, aretenons g, which are adapted to fit in the mortises b oftheventilator-bar, the ianges resting on the shoulders c, so as to supportthe grate-sections in a horizontal position and on a line with eachother. The end grate-sections adjacent to the bearing-plates C are cutout at G to receive the middle finger D, and on the underside of theextreme ends are provided with recesses h to receive the blocks or lugse, the ledge (Z supporting the ends of said sections, as will be readilyseen. When in position, the grate-section should come on the samehorizontal plane as the bearing-plates C C.

It will be understood that by the tenon-and mortise connection betweenthe grate-sections and the ventilator-bar the sections may be detachedtherefrom for the purpose of renewal, when desired. Thistenon-and-mortise connection has been claimed by William Solt, one ofthe present applicants, in his Patent No. 303,675, dated August 19,1884, to which reference is hereby made.

The object of providing the proiectionsfon the sides ofthegratewsections is to form aspaee between the horizontal series ofgrate-bars to allow the insertion of the handle-tongs on each side ofthe grate-sections when removing the same from the bearing or ventilatorbar.

The curved ends of the grate-sections avoid the objections found toexist in the straight ends, in that the raker, when drawn transverselyacross the top of the sections, will not catch or drop down in the spacebetween the endsthereof.V rlhe groovesin the top of the gratesectionsenable the clinkers and other matter to be readily removed therefrom andwithout sticking, as would be the case with a plain-surface bar.Sufficient space is left between the meeting ends of the grate-sectionsto allow for contraction and expansion.

The slots a, in the bearing or ventilator-bar A, combined with theopenings or perforations in the grate-sections, provide increasedventilatingsurface, retaining the grate-bar at an even temperature, andthus avoiding the burning out of the sections. It also affords aconstant draft for the fire, thereby obtaining for a small amount offuel a greater degree of heat than would be possible otherwise.

In Figs. 6, 7, and 8 we` have illustrated various forms ofgrate-sections, each of which possesses superior advantages over thestraightend sections, for the reasons stated. The tensimilarly tothecurved ends, as before described.

Ve may also change the form of the mortises b or the Ventilating-slots ato the various 'shapes seen in Figs. 9, 10, and 11 without departingfrom the spirit of our invention, either of the forms effecting thedesired end.

In place of the projectionsfon the sides of the grate-sections, we mayprovide recesses in lieu thereof, this change enabling the handletongsto be received on each side of the sections when removing the same.

Having described our invention, we claiml. The ventilator-bar A, havingside walls, B B, slots or Ventilating-openings b. and mortises a, incombination with the perforated plate gratesection E,having dependingflanges F and tenons g, as and for the purpose set forth.

2. The ventilator-bar A, having side walls, B B, slots orVentilating-openings a, and mortises b between the slots, in combinationWith the perforated plate grate-sections having depending flanges F,extensions or projectionsf, and tenons g, as set forth.

3. The Ventilating-bar A, having side walls, B B, slots or openings a,morlises b between theslots, and bearing-plates C at the ends of thebar, all cast in one piece, said plates having a ledge, d, provided withblocks or lugs e, and the integral middle finger, D, in combination withthe perforated plate grate-sections having depending anges F,projections or extensionsf, and recesses h in the under side of the endgrate-sections, as set forth.

et. The bearing-plates C, provided with the ledge d, formed with blocksor lugs e, in cornbination with the perforated plate grate-sectionshaving recesses b in the ends thereof to receive the blocks or lugs, asset forth.

5. The ventilator grate-bar A, in combina tion with the bearing platesC, extending transversely across the ends of the bar, and of greaterlength than the width of said bar, and recesses or depressions b',provided in the under side of the bearing-plates on each side ofthepoint ofjuncture with the bar A, as set forth.

In testimony that we claim the foregoing as our own we have heretoaffixed our signatures in presence of two witnesses.

WILLIAM SOLT, SR. VILLIAM D. KLINE. lfitnesses:

Enw. G. SIGeERs, WVM. N. MOORE.

IOO

